Meeting Banner
Abstract #1573

On the minimum phase control required for B1 shimming

Steven M. Wright1

1Electrical and Computer Engineering, Texas A&M University, College Station, TX, United States

Phase only B1 shimming is a cost-effective and simple approach to improving RF field homogeneity for high field MRI. Without a multiple channel transmitter, this is implemented by switching transmission lines or possibly lumped element phase shift networks. This abstract investigates the minimum phase shift required in a potential multi-bit electronic phase shifter. For practical shimming solutions, those not requiring significant increases in power to achieve a 90 degree tip angle as compared to ‘birdcage’ or conjugate phase currents, it is concluded that 45 degrees may be a sufficient resolution for such a phase shifter.

This abstract and the presentation materials are available to members only; a login is required.

Join Here